Here we go, found the link, www.bbc.co.uk/news/magazine-15490760
It says-
Early years specialist Dr David Whitebread, from the University of Cambridge, says one possible solution would be to increase the age at which children start school.
Children in the UK start school much earlier than most of their European counterparts. Dr Whitebread says research has shown that the later children start formal education, the less marked the month effect is.
"In countries where they start a year older than the UK, the month effect is less marked and in countries where they start as late as seven, it completely washes out."
If children are kept playing in kindergarten until the age of six or seven, they are better equipped to cope with formal education, he adds.
Sorry, posted on the wrong tread first 